Comment by Tor3

Also, those new SDKs make slightly older Android versions not work anymore with the updated applications, in some cases. My main Android tablet can't get updates for several apps, and some apps are updated but won't work with e.g. Chromecast anymore (and were updated _only_ because of the nag-system of Google, there are no changes in the apps themselves).

And going to the latest Android version isn't an option, that would imply buying a (at these times Really Expensive) new tablet, and what's offered now aren't even covering what I want from a tablet. Of course, if the vendors continued to provide updates to tablets and phones.. but they don't.